Last updated: 21 October 2026
These terms govern your use of Kerf: Construction Calculator (the "App") and https://kerf.pixoby.space, provided by Pixoby ("we", "us"). By using the App you agree to them. Our Privacy Policy explains how we handle information.
Kerf calculates quantities, dimensions and costs from the numbers you enter and from typical product values that you can edit. Results are estimates. They are not engineering, architectural or professional advice and do not replace a site measurement, the manufacturer's instructions, a licensed professional or the building official.
Code checks (for example IRC or NEC references) are informational. Codes are adopted and amended locally, so your local building department has the final say. Kerf does not size structural members such as beams, headers, joists or rafters. Check critical work before you cut, order or pour.
We grant you a personal, non-exclusive, non-transferable license to use the App on devices you own or control, subject to these terms and to the rules of the App Store or Google Play you downloaded it from. You may not copy, resell, reverse engineer or redistribute the App except where the law allows it.
Every calculator is free. Kerf Pro is an optional one-time in-app purchase that unlocks the features described in the App at the time of purchase. It is not a subscription and does not renew. Payment, refunds and family sharing are handled by Apple or Google under their terms. A purchase made on one store is not visible on the other unless you sign in with the same Apple or Google account in the App.
Jobs, estimates, price lists, notes and photos you create belong to you and are stored on your device. You are responsible for keeping backups. You are responsible for the estimates and documents you send to your customers.
Do not use the App to break the law, to infringe someone else's rights or to interfere with our services.
We may update the App, add or change features and update these terms. If a change to these terms is significant we will tell you in the App. Continuing to use the App after a change means you accept it.
The App is provided "as is" and "as available". To the fullest extent permitted by law we disclaim all warranties, express or implied, including fitness for a particular purpose, accuracy and non-infringement.
To the fullest extent permitted by law, we are not liable for indirect, incidental, special or consequential damages, or for lost profits, materials, labor or rework, arising from your use of the App or reliance on its results. Our total liability for any claim is limited to the amount you paid for the App in the twelve months before the claim. Some jurisdictions do not allow these limits, so they may not apply to you.
If you downloaded the App from the App Store, these terms are between you and Pixoby, not Apple. Apple has no obligation to provide maintenance or support and is not responsible for claims about the App. Apple and its subsidiaries are third-party beneficiaries of these terms and may enforce them. Apple's standard Licensed Application End User License Agreement also applies.
Pixoby, info@pixoby.space